The rectangle of 5cm in length and 3cm in width is rotated around the length and width respectively to get two different geometries, which one is more than one

The rectangle of 5cm in length and 3cm in width is rotated around the length and width respectively to get two different geometries, which one is more than one

What is the volume of a geometry that rotates around a long axis
3 × 3 × 3.14 × 5 = 141.3 (cm3)
What is the volume of the geometry that rotates around the width
5 × 5 × 3.14 × 3 = 235.5 (cm3)
So the volume of the geometry rotating around the width is large

What is the 2005 power of (- 2) plus the 2004 power of (- 2)

2005 power of (- 2) plus 2004 power of (- 2)
=-2^2005+2^2004
=2^2004(-2+1)
=-2^2004

The square is a rectangle. Beibei and Lili start from point a to both sides. Beibei walks 50 meters per minute and Lili walks 4 meters per minute
The square is a rectangle. Beibei and Lili start from point a (point a is on the top of the left foot of the rectangle) and walk along the side of the square at the same time. Beibei walks below point a, 50m per minute. Lili walks to the right of point a, 40m per minute. As a result, they meet at point C above point B (point B is in the lower right corner). Given that point C is 20m away from point B, what is the perimeter of the square?

When we meet above point B, it means that Lili walks less than 20m and Beibei walks more than 20m. Beibei walks more than Lili by 40m. 20 + 20 = 40 (m)
Beibei walks 10m more than Lili every minute, 50-40 = 10 (m)
It means that the walking time is 4 minutes
Perimeter: (40 + 50) × 4 = 360 (m)
Baidu team "mathematics enthusiasts 4 group" member Zuo AI answers for you,
Because there is no graph. The answer may be right. It can be deduced by formula

In square ABCD, AE = BF = CG = DH = 1 / 3XB, then the area ratio of efgh and square ABCD is

5：9

It is known that M-1 + 5 = - 1 of (m-2) x is a linear equation of one variable about X. the value of M and the solution of the corresponding equation are obtained?
Seeking details~

From the meaning of the title, we can get: | M-1 | = 1 and m-2 ≠ 0
The solution is: M = 0
Then the original equation can be written as: - 2x + 5 = - 1
That is: - 2x = - 6
The solution is: x = 3

The speed of car a is 75% of that of car B. the two cars run from a and B to each other at the same time and meet at the midpoint of 5km. What's the distance between a and B?

(5 × 2) △ 1-75%, = 10 △ 25%, = 40 (km); 40 × 75% = 30 (km); 40 + 30 = 70 (km); a: the distance between a and B is 70 km

If the sum of two sides of an isosceles triangle is 18cm and one side is 5cm, the circumference of the isosceles triangle is () cm
A. 13 b.31 c.23 d.23 or 31

D. The sum of the two sides is 18cm, and one side is 5cm, which means that one of the two sides is the bottom edge, but the wood tells you the length of the bottom edge, so there are two cases

If the sides of △ ABC are all integers and the length of the largest side is 7, then such triangles have the same length______ One

Let the other two sides be x, y, then x ≤ 7, y ≤ 7, and X + Y > 7, and X, y are all integers. Let x ≤ y, the values of X, y satisfying the above conditions are: 1, 7; 2, 6; 3, 5; 4, 4; 6, 3; 2, 7; 4, 5; 4, 6; 5, 5; 7, 3; 4, 7; 5, 6; 5, 7; 6, 6, 7; 7, 7

Calculation problems in grade four of primary school

1、 Vertical calculation (I) (II) (III) (IV) (V) 825 △ 25 = 9864 △ 48 = 900 △ 22 = 57 × 307 59 × 198 = 689 △ 34 = 1105 △ 55 = 504 × 32 = 358 △ 25 538 △ 33 = 986 △ 29 = 13320 △ 70 = 603 × 36 = 812 △ 57 = 860 △ 30 = 647 △ 27 = 786 △ 94 =

When the side length of a square increases by 3cm, it becomes a new square, and the area increases by 33 square cm. What is the side length of the original square?

4